Metal pin rack for fabric stretching machines



y 1960 e. MOHRING 2,935,779

METAL PIN RACK FOR FABRIC STRETCHING MACHINES Filed Aug. 29, 1955INVENTOR GustavZIc'ihz-ing A'ITORNEYS f 2,935,779 Patented May 19, 1960METAL PIN RACK FOR FABRIC STRETCHING MACHINES Gustav Miihring,Stuttgart, Germany, assignor to Famatex G.m.b.H.,Stuttgart-Kornwestheim, Germany, a firm Application August 29, 1955,Serial No. 531,046

(Claims priority, application Germany September 3, 1954 11 Claims. (Cl.26-62) The present invention relates to fabric stretching machines, andmore particularly to a pin rack made of metal which is used on fabricstretching machines especially in the treatment of fabrics and the likewith high temperatures which must be maintained within narrow limits. Itis difficult when carrying out such treatment to ensure that the hightemperature is uniform over the entire width of the web, because thetenter chains and the pin racks carried thereby cool down outside thedrying chamber and, in running through the drying chamber, must be againheated, so that the temperature at the edges of the cloth is subjectedto considerable fluctuations and mostly differs from the temperature inthe middle portion of the cloth web. In order to reduce the influence ofthe cold chain it has already been proposed to introduce a heatinsulating connection between pin rack and chain link. It has been foundthat the objection is reduced by this measure but not overcome.

The object of the invention is to provide a metal pin rack having aplurality of pins rigidly fixed in the metal pin rack and adapted topierce the edge of a cloth web, which metal pin rack comprises a metalrack plate, carrying the pins, and spacing means preventingheat-conducting contact between said rack plate and said cloth webpierced by the pins. 7

In particular the spacing means may consist of a protective layer withlow heat-conductivity applied on to the metal-rack plate, or a steppedenlargement of thefeet of the pins themselves, or peg-like projectionsfrom the plate of the pin rack in which projections the pins of the pinrack are located and which can themselves be fitted in bores in therackplate, or finally they may consist of shorter spacer pins arrangedbetween the pins on the pin rack.

With such pin racks it ispossible, for example, when heat settingfabrics made of all-synthetic threads in a high temperature section of adrying machine to attain at temperatures between 190 and 250 C., asufiiciently good and uniform quality of goods, whereas with the pinracks hitherto known it can always be observed that the pierced edges ofthe fabric are not so thoroughly heat set as the middle portionsthereof. Also when rendering woven fabrics crease-resistant, for whichhigh temperatures are exclusively used, the advantages of the pin rackaccording to the invention will be particularly apparent.

Several preferred embodiments of the invention are illustrated by way ofexample in the accompanying drawing, in which:

Fig. 1 is a perspective view of a pin rack with a special form of pins;

Fig. 2 is a section of a part of a pin rack with pins fitted in pegsprojecting from a rack plate;

Fig. 3 is a section of a part of a pin rack with pins inserted in pegsprojecting from the rack plate and secured in bores provided therein,and

Fig. 4 shows a pin rack with spacers arranged between the individualpins.

The metal pin rack according to Fig. 1 consists of a metal rack plate 1provided with a number of pins 2 each comprising a point Which,-according to the invention, projects with a shoulder or step from a pinfoot 3 of larger diameter.

According to Fig. 2 the rack plate 1 has at the points Where pins 2 arearranged, peg-like projections 4, preferably with flat tops are made inone piece with the rack plate 1 by pressing, casting or the like. Thepins 2 which in this case are of the known shape, are introduced,preferably pressed, from below into bores in the rack plate 1, a borebeing provided in the middle of each projection for this purpose.

According to Fig. 3 the pins, constructed in known manner are fitted inseparate, preferably cylindrical, but if desired also conical pegs 5,which themselves are fitted in suitable bores 6 in rows or othersuitable arrangement in the rack plate 1. The conical pins are fixed inthe pegs 5 and these pegs 5 in turn are fixed in the rack plate 1,preferably by pressing. The needles are pressed into the pegs before thepegs are inserted in the rack plate 1. The pressing in of the pinscauses the pegs to expand slightly which assists in giving the pegs abetter hold when being pressed into the plate.

The pegs and pins can be made for example from stainless steel or thelike. In most cases it will sufi'ice to make the rack plate 1 from aless high grade material, such as tin-plated brass or the like.

The bores for securing the pins 2, 2 in the plate 1 or in the pegs 5 areat an incline to the surface of the plate or the axis of the pegs tocorrespond with the desired inclination of the pins.

The pegs 5 can also be made of heat insulating material.

According to Fig. 4 short spacer pins 7 are arranged between each twoneighboring pins 2 of usual shape, these spacer pins being blunt and, asshown in Fig. 4, are preferably provided with domed heads 8.

' 'In all cases direct contact between the cloth web and the widesurface of the rack plate 1 is reliably avoided.

When using an insulating protective layer as spacing means a layer 9 ofsynthetic resin or other material possessing favorable thermalproperties in the sense of the invention can be applied on to the metalpart of the rack plate 1, as indicated in Fig. 1. The mechanicalstrength of the protective layer is not a determining factor because thepins are held in the metal rack plate 1 of the pin rack. Of course, itis possible to use the protective layer 9 also in connection with metalpin racks as are shown and described with reference to Figs. 2, 3 and 4.

From the above detailed description of the invention, it is believedthat the construction will at once be apparent, and while there areherein shown and described several preferred embodiments of theinvention, it is nevertheless to be understood that minor changes may bemade therein without departing from the spirit and scope of theinvention as claimed.

I claim:

1. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric Web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a steplike enlargement extending from the end of thepin inserted in said metallic rack plate and projecting beyond saidplate toward the pin point so as to hold said fabric web spaced fromsaid plate.

2. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of peg-like projections on the surfaceof the rack plate, in which projections the pins are fitted.

3. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of pegs formed separate from the rackplate and the pins and each carrying a pin and being inserted in asuitably located bore in the rack plate.

. 4. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of pegs each carrying a pin in a boreand being inserted in a suitably located bore in the rack plate, thebores in the pegs carrying the pins being arranged at an incline to thesurface of the rack plate and to the peg axis corresponding to a desiredinclination of the pins to the rack plate surface.

5. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of pegs each carrying a pin andexchangeably inserted in a bore in the rack plate.

6. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of pegs each carrying a pin and insertedin a bore in the rack plate, said pegs being made from heat insulatingmaterial.

7. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of peg-like projections formed in onepiece with the rack plate on the surface thereof and each carrying apin.

8. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate'and adapted to pierce the edge of a'fabric web, andpeg-like spacing means preventing heat-conducting con- .tact betweensaid metallic rack plate and said fabric web pinned thereon, saidspacing means consisting of a plurality of short spacer pins arrangedbetween the rack pins.

9. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of short spacer pins arranged inalternating relation to the rack pins.

10. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, andpeg-like spacing means preventing heat-conducting contact between saidmetallic rack plate and said fabric web pinned thereon, said spacingmeans consisting of a plurality of short spacer pins provided with domedheads and arranged between the rack pins.

11. A metal pin rack for use in fabric stretching machines employingtenter chain means for conveying a fabric web therethrough, said metalpin rack comprising a metallic rack plate, a plurality of pins fixed insaid rack plate and adapted to pierce the edge of a fabric web, and aplurality of peg-like spacing members adapted to prevent heat-conductingcontact between said metallic rack plate and said fabric web pinnedthereon.

References Cited in the file of this patent UNITED STATES PATENTS221,369 Spitzli Nov. 4, 1879 487,240 Backof Dec. 6, 1892 600,205 LearyMar. 8, 1898 696,716 Caldwell Apr. 1, 1902 872,296 Hoskins Nov. 26, 1907899,696 Hochstaetter Sept. 29, 1908 1,057,207 Allen Mar. 25, 19132,521,685 Block Sept. 12, 1950 2,559,713 Dunski et al July 10, 19512,626,062 Manzella Jan. 20, 1953 2,719,349 Laurie Oct. 4, 1955 FOREIGNPATENTS I 335,166 Germany Jan. 31, 1920 OTHER REFERENCES Anheuser-Busch,Inc., advertisement, page 144 of Textile World, August, 1954. (Copy inDivision 21.)

